2009 Dakota, 4.7L V8, Big Horn, 4WD. Trying to fix my transmission fluid leak. Noticed the AT oil cooling line connector was disconnected from the radiator. The threads to the male connector had corrosion and the thread was no good. Does anyone know where I can get this adaptor/connector without having to buy a whole new radiator??? No auto parts store in my area sells this part. Will a dealership sell me this individual part?? Thanks!

 

You have to replace radiator. I had one like that at work hope you did not run it dry or could have trans problems as was the case with the one at work ended up rebuilding trans.Or get a after market trans cooler

 

Yep. You need to replace the radiator.

 

Nope, you cannot repair that connection. Plus, Nope you do not have to replace the radiator. Take this as an opportunity to install a dedicated transmission cooler (mini rad). You can get a full kit for reasonable price:
For example: this: search the Hayden 679 kit on Amazon, or anything similar.

Install the dedicated cooler, plug the transmission holes in the bottom of the old radiator, and truck on with a far superior setup! Your engine is still cooled by the rad, the transmission is cooled by the new cooler.

A good read on coolers:
https://www.etrailer.com/faq-engine-...n-coolers.aspx

 

While the above is a workable solution, the only caveat is that the in-radiator cooler also warms the transmission fluid to bring it up to temperature for proper operation. If this isn't a concern, have at it.